Harrow.



G. A. MONROE & W. E. ROBINSON.

- HARROW.

APPLICATION FILED AUG. 19. 1910.

1,006,972. Patented 001. 24, 1911.

3 SHEETS-SHEET 1.

COLUMBIA PLANOURAPl-l co.. WASHINGTON. D. c.

0. A. MONROE & W. E. ROBINSON.

HARROW.

APPLIOATION FILED AUG.'19. 1910.

Patented 0013.24, 1911.

3 SHEETS-SHEET 2.

' wwmtoms QAMonroc "4 WE li /imam COLUMBIA PLANOGRAPH 60.,WA5HINOTON. D.c.

O. A. MONROE & W. E. ROBINSON.

HARROW.

APPLICATION FILED AUG. 19. 1910.

1,006,972, Patented Oct. 24, 1911.

3 SHEETSSHEET 3.

UNlTE TATEO' PATENT @FFTCE.

CHARLES A. MONROE AND WILLIE E. ROBINSON, OF LOWER LAKE, CALIFORNIA.

HARROW.

Specification of Letters Patent.

Patented Oct. 24L, 1911.

Application filed August 19, 1910. Serial No. 578,009.

To all whom it may concern:

Be it known that we, CHARLES A. MONROE and WILLIE E. ROBINSON, citizensof the United States, residing at Lower Lake, in the county of Lake,State of California, have invented certain new and useful Improvementsin Harrows; and we do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to disk harrows and has for its principal objectto provide a harrow that will more effectively level uneven ground thanusual by virtue of having a pair of independently controlled diskshafts, the opposed ends of these shafts being capable of movementvertically and horizontally in order to enable the disks to be set atanydesired angular position relatively to the longitudinal axis of theharrow to attain the above end.

A further object is to provide a simple, strong and durable harrow thatwill have a novel tongue which carries an adjustable caster.

With the above Objects in view, the invention consists of the noveldetails of construction and combination of parts hereinafter fullydescribed and claimed, it being understood that various modificationsmay be made in the minor details of construction within the scope of theappended claims.

In the accompanying drawings forming part of this specification: Figure1 is a plan view of a harrow constructed in accordance with ourinvention. Fig. 2 is a longitudinal sectional view taken on the line 22,Fig. 1. Fig. 3 is a transverse sectional view taken on the line 33,Fig. 1. Fig. 4; is an end elevation of the harrow. Fig. 5 is an enlargedside elevation of one of the outer shaft boxes, with portions brokenaway to expose the roller bearings. Fig. 6 is an enlarged side elevationof one of the inner shaft boxes with portions broken away to expose theroller bearings.

Referring now to the drawings, the harrow frame is shown to berectangular in contour and formed from an angle iron strip of metal. Thelongitudinal sides 10 and ends 11 are connected together at theirmeetings by rivets or similar connectors 12. A plurality of arched fiatrods 13 have their opposite ends bolted or otherwise rigidly secured tothe longitudinal sides of the frame as shown at 14. These rods arepreferably arranged in pairs, a pair being arranged adjacent each endbar of the frame and a pair being arranged at approximately the centerof the frame, this latter pair serving as a support for the shaftadjusting levers hereinafter described. A pair of flat bars 15 aresupported upon the top faces of the rods 13, one of these bars beingplaced upon either side of the longitudinal axis of the frame, andbolted or otherwise rigidly secured to the arched rods as shown at 16.This frame just described forms a rigid and open housing above thecolters or harrow disks 17 The harrow disks are arranged in sets, eachset being fixed upon an independent shaft one end of which is held by aknuckle to one end bar of the harrow frame and the opposite end of whichis suspended for vertical and horizontal movement, thus presentingindependently movable sets of disks. The number of shafts in thisinstance is shown to be two designated by the numerals 18 and 19, theseshafts being alined and having their outer ends secured to the end barsof the harrow frame.

For securing the outer ends of the shafts to the end bars of the harrowframe, knuckles 20 are provided, and since these knuckles are identicalin construction, but one will be now described. A metal yoke 21 isprovided at the central portion of its shoulder with a stem 22 whichprojects through a suitable opening 23 formed in the end bar of theharrow frame. This stem is provided upon its intermediate portion with awasher like collar 24 which is adapted to bear upon the bottom face ofthe harrow frame end bar, the stem being further equipped at itsextremity with a retaining nut 25 which is spaced from the top face ofthe frame end bar by a washer 26. Bolted to the bottom face of the endbar as shown at 27 is a pair of keepers, each keeper having itsintermediate portion bent at right angles and extending parallel withthe outer edge of the collar 24 as shown at 28, and being thence bent toextend over and engage the bottom face of the collar as shown at 29,these latter named bent portions of the keeper being adapted to form abearing which cooperates with the bottom face of the end bar to retainthe yoke in place without relying upon the nut 25 to accomplish thisend. These keepers prevent lateral or rocking movement of the yoke andpermit of theyoke swiveling to any desired degree. The branches 30 ofthe yoke are provided adjacent their middle portions with alinedcircular openings 31 for the reception of the shaft boxes. Each shaftbox is formed in two sections, each section comprising a substantiallysquare solid shank 32 having one end provided with a tubular gudgeon 32,the intermediate portion of the shank being arched outwardly to form asemicircular roller housing 33, this housing being provided upon itsinner periphery with a recess 34: in which is loosely mounted rollers35, the periphery of these rollers extending beyond the edges 36 of theroller housing as shown. The shank of each section is provided adjacentthe ends of the roller housing with bolt openings 37 and is furtherprovided adjacent one end with a stop shoulder 38.

In assembling the sections, the gudgeons of the sections are inserted inthe circular openings in the yoke branches until the stop shoulders arein abutting contact with the opposed faces of the branches and when inthis position the bolt openings of each shank section will have comeinto registration, when bolts 39 may be passed through the registeringopenings to rigidly secure the sections together, it being understoodthat when in this position the disk shaft is dis posed with itsperiphery engaging the peripheries of the rollers. It will be here notedthat the yoke is capable of swiveling upon the end bar of the harrowframe and that the sectional axle box is capable of rotating in theyoke, this construction permitting of the free end of the shaft carriedWithin this knuckle to move vertically or horizontally in order todispose the harrow disks in any angular position relatively to thelongitudinal axis of the harrow frame.

For securing the opposed ends of the shafts 18 and 19 in any desiredposition, a pair of boxes 40 are suspended from the arched rods of theframe, and since each of these boxes is identical in construction,butone will be now described. The box is formed from two sections eachsection comprising an arcuate channel bar L1 between the lateral flangesof which are housed a plurality of rollers 42, the extreme ends of theback plate of each of the channel bars being provided with laterallyextending plate like lugs 43 through which bolt openings 44 are passed.In assembling the sections, bolts 45 are passed through the registeringbolt openings of the abutting lugs of the sections and rigidly securethe sections together. The peripheries of the rollers 42 project beyondthe inner periphery of the lateral flanges and engage the periphery ofthe shaft. Fixed at one end upon the uppermost section of the box is ahook 46 and fixed upon the outer extremity of the forward lug of theupper section is a post 4E7, this hook and post forming means forsuspending the box from the harrow frame as will now be described.

Mounted upon the centrally located arched rods are a pair of notchedsegments 48, one segment being arranged above each box 40. Each segmentis provided at its opposite ends with a pair of radial bars 4.9 whichmeet at the center of curvature of the segment and merge at theirmeeting into a tubular bearing 50. The notched segment may be secured tothe arched rods in any preferred manner, one expedient method being toengage a pair of clevises 51 over the outer corners of the notchedsegment and coinciding portions of the arched rod, the flat cross bar 52which connects the threaded terminals of each clevis being advanced bythe retaining nuts 53 of the clevis so as to tightly crimp the sagmentand arched rod together. An L shaped actuating lever 54: is provided atits elbow with a laterally extending gudgeon 55 which is disposed in thebearing 50 of the notched segment and is provided at its extremity witha retaining nut 56 which prevents its accidental withdrawal. The shortleg of this bell crank lever is pivotally connected to one end of aconnecting link 57, the opposite end of this link being provided with aneye 58 which engages the before mentioned hook 46. It is now evidentthat when the lever is rocked forwardly that through the instrumentalityof the link and hook, the shaft box 40 will be moved vertically up ward,and when the lever is rocked rearwardly, it will be moved verticallydownward. For holding the shaft at any particular position within thelimits of its vertical movement a latch rod 59 is pivoted adjacent itsupper end to the grip 60 of the lever 54 and engages the notches of thenotched segment with its free end. The extreme upper end of the latchrod is offset outwardly as shown at 61 and a leaf spring 62 holds thisoffset extremity spaced from the grip 60 of the operating lever. Bycompressing the offset portion 61 of the latch the free end of the latchmay be lifted from engagement with the segment so that the lever may berocked to any desired position and when the latch is released the freeend of the latch again engages the segment and locks the lever andthereby the shaft at its particular position desired by the operator.

For moving the free ends of the shafts horizontally, a pair of notchedsegments 63 is mounted upon the arched rods adjacent their junctureswith the leading longitudinal side bar of the harrow frame. Each segmentis similar to the segments above described, that is, has extending fromits extremities a pair of radial bars 61 which merge at their meetinginto a tubular bearing 65, these segments being secured to the archedrods by means of clevises 66 as shown. Arranged in the tubular bearingof each notched segment is a straight lever 67 having a laterallyextending gudgeon 68 intermediate its ends engaged in the segmentbearing and provided with a cotter pin 69 which prevents its accidentalwithdrawal. The lower end of the lever is provided with an eye 70 whichengages the hooked extremity of a link 71, the latter terminating at itsfree end in an eye 72 which is swivelly mounted upon the beforementioned post 47, the latter being equipped with a cotter pin 7 3 whichprevents the displacement of the connecting link. It is now evident thatby rocking forwardly the lever that the free end of the shaft is movedhorizontally rearward and by rocking rearward the lever the free end ofthe shaft is rocked horizontally forward. F or locking the lever in anydesired position, a spring pressed latch 74 is mounted upon the lever,this latch being similar to the latch above described in detail.

From the above description, it will be seen that the operator who sitson a seat secured upon the longitudinal bars 19 as will hereinafter bedescribed, is in con venient reach of all four of the levers which movethe free ends of the shafts and may move all of the levers or anyparticular set of levers which will affect the desired adjustment of theshafts. The operators seat comprises a saddle 75 supported upon aninclined saddle post 76, the lower end of this saddle post being bent toengage the bottom faces of the bars and being bolted or otherwiserigidly secured to the bars as shown at 77. An inclined brace 78 issecured at one end to the lower face of the saddle post and at itsopposite end to the top face of the rearmost bar 15.

The draft tongue 79 employed in connection with the harrow frameconsists of a straight short bar of metal, one extremity of this barbeing equipped with an apertured draft iron 80 and the oppositeextremity being split and the branches di rected laterally as shown at81, each branch being bent longitudinally upon itself and the legs ofthis bent portion bolted as shown at 82 and 83 to the legs of theleading side bars of the frame, the bent portion of each of thebranches81 snugly fitting in the elbow of the angle iron side bar as shown.

A caster 8A is mounted upon the tongue, this caster having a hanger 85which works in a bearing box 86 adjacent the free end of the tongue andprojects considerably above the tongue. The upper end of the hangerterminates in a swivel head 87 which is inclosed by a socket 88, thelatter being secured to the intermediate portion of a lever 89 forlowering or raising the caster. The lever is fulcrumed at its free endon a standard 90 and is provided with a spring latch 91 which engages anotched segment 92 of the preferred form shown.

Mounted upon the rear longitudinal bar of the harrow frame is a centercut 93. The center cut support comprises a plate 94, the lower edge ofwhich is turned outwardly at right angles to the main body of the plateand bears upon the bottom face of said bar and is rigidly securedthereto by bolts, rivets or similar connectors 95. Bolted to the plate 91 is a metal rack 96, the free end of this rack being connected to theplate '94 by an arcuate strip 97, the free end of this strip beingbolted to the plate as shown. Rising obliquely from the strip 97 is astandard 98 to which is pivotally secured a lever 99, this lever havinga gudgeon which extends through a suitable opening in the standard andis equipped at its extremity with a rack segment 100. The rack 100meshes with the rack formed on the shank 102 of the center cut, thelatter being secured to the plate 94 by means of guide straps 103 whichpermit of the center cut shank sliding upward or downward when the leveris rocked. A spring latch 10 1 is mounted upon the lever and engages thenotched segment 96 whereby to enable the center cut to be locked in anydesired position. The free end of the center cut shank is provided withan arcuate link 105 which terminates in a V shaped extremity, this Vshaped extremity serving to fit in a like shaped opening formed in aplow share 106 and removably secure the latter in position.

What is claimed is 1. A harrow including a frame, arched brace rodscarried by said frame, a pair of shafts mounted on said frame, andhaving knuckle connections between their outer ends and said frame,boxes secured to the inner ends of said shaft, a pair of levers pivotedon said arched rods, links loosely connected to said levers and to saidboxes for moving the inner ends of the shafts horizontally, a pair ofbell crank levers pivoted at their elbows on said arched rods, and linksconnected to said bell crank levers and to said boxes above the firstnamed links and operating to move the inner ends of said shaftsvertically.

2. A harrow including a frame, arched brace rods connected to saidframe, yokelike shaft hangers having posts mounted to turn in openingsin the frame end bars, said posts having flanges bearing against saidend bars, strap brackets on said end bars projecting over said flangesand retaining the same in position, bearing boxes pivotally mounted inthe branches of said yoke like sleeves for moving the inner ends of said10 hangers, a pair of disk shafts mounted to shafts vertically.

turn in said boxes, disks on said shafts, In testimony whereof, We aflixour signasleeves engaging the inner free ends of said tures in presenceof two Witnesses.

shafts, levers pivoted on said arched rods CHARLES A. MONROE.

and loosely connected to said sleeves for WILLIE E. ROBINSON. moving theinner ends of said shafts horizontally, and bell crank levers pivoted onsaid rods and loosely connected to said Witnesses:

J. W. TREMPER, FRANK AKINs.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. G.

